Recess joint for road construction

ABSTRACT

A recess joint for road construction having feet attachable thereto which may be of various heights so as to make the recess joint useable for various thicknesses of concrete to be poured in the construction of various roads.

United States Patent Franklin T. White Morning Sun, Iowa 52640 750.191

Aug. 5. 1968 Feb. 9, 1971 Inventor Appl. No Filed Patented RECESS JOINT FOR ROAD CONSTRUCTION 1 Claim, 4 Drawing Figs.

US. Cl 249/9,

249/219, 52/539, 18/43 Int. Cl E0lc 11/02 Field of Search 249/9, 5, 4.

3,101.98, 219;25/118W, 118M, 131CM, 131R, 131U;18/42M, 43; 52/539. 519

[56] References Cited UNITED STATES PATENTS 1.719823 7/1929 Eklof 25/131 3,347,515 10/ 1 967 White 249/9 Primary Examiner-J. Spencer Overholser Assistant Examiner-DeWalden W. Jones Attorney-Wm. T. Metz ABSTRACT: A recess joint for road construction having feet attachable thereto which may be of various heights so as to make the recess joint useable for various thicknesses of concrete to be poured in the construction of various roads.

PATENTEU m1 919" 3,561,720

M/VE/VTOR. FRANKL/IV T WH/TE RECESS JOINT FOR ROAD CONSTRUCTION BACKGROUND OF THE INVENTION 1 Field of the Invention v This invention pertains to the forms used in building roads and more particularly to a means to vary the height of a part of the forms known as the recess joint.

2. Description of the Prior Art Heretofore in the road construction art the road has been build in longitudinal sections having recess joints running parallel with the road to be build. Withmodern road building machines the method used is to lay-a slab of concrete for one lane of the road and to join it to a second slab of concrete for another lane of the road by the recess joints and tie bars. The two slabs of concrete that join each other thus make up the two lanes of the road and are tied together by the tie bars which extend through the recess joints. Heretofore the recess joints had feet welded to them and spaced at about 3 feet intervals. The height of the feet depended on the thickness of the slab of concrete for the road. Thus recess joints having feet of a specific height could be used for only one thickness of concrete.

SUMMARY OF THE INVENTION The recess joint has accommodations for feet of different height thus making it possible to use the recess joint on different jobs.

It is therefore an object of this invention to provide a recess joint which will accommodate feet of different heights.

It is a further object of this invention to provide means to attach feet of different heights in a stable manner to recess joints.

It is a further object of this invention to provide recess joints that may be used on jobs requiring different thicknesses of concrete.

It is a further object of this invention to provide recess joints that have removable feet thus making the recess joints easily stacked for shipping and use.

Further objects and advantages of this invention will become apparent from the following drawings, descriptions and claims.

BRIEF DESCRIPTIONS OF THE DRAWINGS In the drawings FIG. 1 is an isometric view of a portion of a road bed showing a portion of a recess joint having a foot attached thereto. FIG. 2 is an isometric view of a portion of a recess joint having the foot removed therefrom. FIG. 3 is an isometric view of a foot which is attachable to the recessjoint of FIG. 2. FIG. 4 is an isometric view ofthe recess joint having a modification of the invention showing a foot attached to the bottom portion of the recess joint.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, a portion of a road bed I is shown having a side form 2 laid thereon. A recess joint 3 is held at a proper height represented by the distance d about the road bed I and against the side form 2 by the foot 4. The distance d may be varied by inserting a foot 4 having different heights. A stake 5 also holds the recess joint 3 against the side form 2. A hole 6 in the recess joint 3 is designed to receive tie bars which are unshown. The foot4 is slideable into slot 7 in the recess joint 3.- The slot 7 is formed by punching a strip 8 from the recess joint 3.

The method used for road construction is to put the side forms 2 down along the road bed I. The recess joints 3 are set at the desired height d which is generally so that the center of the recess joints 3 are one-half the thickness of the concrete to be poured above the road bed I. This is predetermined and feet 4 of a desired height D are inserted into the slot 7 in the recess joint 3. The stake 5 is then driven into the road bed I to hold the recess joint 3 in position. Tie bars unshown have already been inserted throu h the holes 6. The distance D of the foot 4 coincides with the istance d that the recess joint 3 is to be placed above the road bed I. The surfaces 9 and 10 of the foot 4 fit against the surfaces 11 and 12, respectively of the recess joint 3 to support the recess joint 3 against the side form 2.

Using feet 4 thus creates the flexability of using a large stock of recess joints 3 for various thicknesses of slabs of concrete. In the past this has not been done and stocks of recess joints could only be used for the thickness of concrete for which they were designed.

FIG. 3 shows a modification of the means to vary the height d of the recess joint 3 by having a foot I3 constructed so as to fit on to the bottom of the recess joint 3. Varying the height D of the foot I3 thus accomplishes the same result.

I claim:

1. A recess joint for road construction having a channel shaped form member adapted to be placed with its recessed side against a road form, feet adapted so as to fit on to the bottom of said form member to hold said form member a specified distance above the road bed. 

1. A recess joint for road construction having a channel shaped form member adapted to be placed with its recessed side against a road form, feet adapted so as to fit on to the bottom of said form member to hold said form member a specified distance above the road bed. 